Draft-rigging



D. S. BARROWS.

DRAFT RIGGING.

APPLICATION FILED MAY3I, 1918.

1,358,502. Patented NOV. 9, 1920.

2 SHEETSSHEET I.

I I n L l l I I mmmto'z UNITED STA'EIE DONALD S. BARROWS, OF ROCHESTER,NEW YORK.

DRAFT-RIGGING.

Specification of Letters Patent.

Patented Nov. 9, 1920.

Application filed May 31, 1918. Serial No. 237,487.

To (ZZZ whom it may concern Be it known that I, DONALD S. BARROWS, acitizen of the United States, residing at Rochester, in the county ofMonroe and State of New York, have invented certain new and usefulImprovements in Draft- Rigging; and I do hereby declare the following tobe a full. clear, and exact description of the in.' ;;ntio11, such aswill enable others skilled in the art to which it appertains to make anduse the same.

The invention relates to draft rigging for railway cars,- and moreparticularly to a combined back stop and center sill tie casting whichis primarily designed for application to the underframes of freight carsin which the center line of the draft rigging is below the center lineof the center sills, and for use with that type of draft rigging inwhich the coupler is movable rearwardly independently of the yoke inbuffing and the buffing loads are transmitted to and carried by the backstop.

The principal object of my invention, broadly stated, is to provide acombined back stop and tie casting for use under the conditions setforth above, which will possess the advantages of the well known andso-called bath tub type of back stop with reference to the location ofthe rivet openings and ease of application to a car under frame, andwhich at the same time obviates the inherent defects of this old type ofstop casting. To this end the main features of the invention comprise astop casting of hollow box form in. which the bufling face isstrengthened and reinforced by transversely disposed longitudinallyextending webs or flanges which are adjacent the upper and lower edgesthereof and which face is further strengthened by means of a pluralityof vertically extending flanges, the said longitudinally extending websor flanges being provided with openings to permit access to thecontinuous side walls of the said casting for the placing and driving ofthe at- (aching rivets.

A nother feature of my invention is to provide a combined back stop andtie casting of hollow box form which is approximately symmetricalthrough all central planes, thereby securing the greatest factor ofstrength with the least weight.

There are other features of my invention, as will hereinafter more fullyappear in connection with the ('letailed description of the embodimentthereof which has been illustrated in the annexed drawings, in which,

F igure 1 is a top plan view of the invention as applied to a car,portions of the car framing being shown in section.

Fig. 2 is a longitudinal vertical central seqtion of the structure shownin Fig. 1.

Fig. 3 is a transverse vertical section taken on the line 33 of Fig. 1.

Fig. 4 is a front elevation of the combined back stop and tie casting,and

Figs. 5 and 6 are transverse vertical sections taken, respectively, onlines 5-5 and (56 of F ig. 1, looking in the direction indicated by thearrows.

Throughout the specification and drawings like parts are designated bylike reference characters.

Although car underframes vary in height with different types of cars, itis always necessary to maintain the draft riggings at a constantelevation above the rails on all cars so that the couplers thereof willinterlock. To maintain this uniformity of height it is necessary tolocate the couplers and the attached draft riggings at different pointswith relation to the car center sills.

In cars in which it is necessary to locate the center line of the draftrigging below the center line of the car sills, to maintain the couplersat the standard height it has heretofore been necessary to sacrificestrength, in the backstop, for convenience of attachment. It is readilyapparent to those skilled in this art that a back-stop casting in theform of an I-beam section with the web thereof arranged in the line ofdraft and the flanges disposed equally above and below the web, is thestrongest type of casting for unit weight which can be devised. Thisconstruction, while highly desirable, cannot be used on cars of the typereferred to for two rasons, first, the impossibility of driving thelower row of rivets, that is the rivets below the web of the I-beam,and, second, because the distance from the web of the I-beam to thelower edge of the center sill does not give sutlicient riveting area toafford a strong connection. It has therefore been the practice in thepast in cars of this construction to employ in place of the highlydesirable I-beam section back stop, a back stop in the form of an openbox having a bottom plate and vertical flanges extending upwardly fromthe edges of this bottom plate. This form of back stop has been calledthe bath tub type. This back stop while permitting the necessary numberof rivets to be employed to adequately attach the same to the car sills,and not interfering with the driving of these rivets, is structurallyweak, since the loads transmitted to the bufling face are out of linewith the web and therefore exert a powerful leverage against the upperportion of the striking face and distort the same.

The back stop hereinafter described is- -mechanism and the couplerconnecting means is held from rearward movement by means of a centrallyarranged back stop. The portion of the draft rigging illustratedcomprises a yoke or coupler connecting means 6, a rear follower 4 whichis interposed between the yoke 3 and the cushioning mechanism 5. .Thetop cover plate is designated by the numeral 6. The rear face of theyoke 3 normally contacts the combined back stop and tie casting 7. Thistie casting, as illustrated, forms also a bolster center bearing, but itis to be understood that the invention is equally applicable to carconstruction in which the center bearing is separate from and located tothe rear of the back stop member. The said casting 7 preferablycomprises a plurality of upright webs or flang s 8, 9, 10 and 11, and aplurality of transversely extending webs or flanges 12 and 13.

A central portion of the web 8 is adapted to form the striking face ofthe said casting, that is, it is adapted to abut the rear face of one ofthe movable parts of the draft rigging. This face 8 may extendtransversely from sill to sill or may be provided with offsets such asshown at 14, 14. The face 8 is connected to the vertical web '11 by thetransversely disposed webs or flanges 12 and 13, and in order to braceand strengthen the flange 12 I may provide the same with vertical ribsor flanges 15 and 16. The side walls or webs 10, 10 of'the said castingpreferably extend upwardly above the plane of the web or flange 12 andare adapted to contact the adjacent sides of the center sills 1.Adjacent their lower ends these flanges 10 are provided with inwardlydirected offsets 16 so as to enable these webs to overlie the verticalflange 17 of the reinforcing angle iron 18. The flanges 10 are alsopreferably extended to the rear of the face or flange 9 so as to provideadditional riveting area.

For convenience, I may provide the casting 6 with laterally extendingwings or projections 19 adjacent the offset portion 1 1 of the face 8.These projections 19. are preferably extensions of the lower flange 13of the casting, and through these extensions and through the horizontalflanges of the reinforcing angle bar 18, I may extend the rivets 20.

As will be clearly seen from Fig. 1, the flange 12 is provided onopposite sides of the thimble 21 with downwardl open slots or recesses22, 23, the lateral ec ges of the slot 22 being reinforced by theflanges 16 heretofore referred to. The lower flange 13 of the stopcasting may be provided with a plurality of openings 24 which arepreferably positioned substantially as shown in the drawings. Theopenings 22 and 23 permit the Withdrawal of the cores after the castingprocess and also provide means whereby the lower row of rivets 25 may beinserted and driven after the casting is placed in position on the carunderframe.

From the foregoing description it will be seen that the bufling face 8is braced and strengthened adjacent its upper and lower edges by meansof the transversely disposed longitudinally extending webs or flanges12. and 13, and that the flange 12 is further reinforced by means of thedownward extending ribs 15 and 16, these ribs being practicallycontinuous from the face 8 to the transversely disposed verticallyextending rib or flange 11. The lower flange 13 is also reinforced by atransversely extending rib 26 which is preferably placed in alinementwith the offset portions of the wall 8. It will also be obvious that theside webs 10 are maintained against deformation by the webs 8, 9 and 11,the latter web being preferably extended upwardly above the plane of theflange 12 so as to reinforce the correspondin ly extended portions ofthe side walls 10.

Iaving now fully described my invention, although it is to be understoodthat by the foregoing description I do not intend to limit myself to theexact details, since the terms used are to be understood in theirdescriptive and not in their limiting sense, what I claim and desire tosecure by Letters Patent is:

1. In a draft rigging, the combination with thecenter sills, of acombined back stop and tie casting adapted to abut a movble element ofthe draft rigging, said casting being provided with a continuous buflingface and a pair of side walls, and means for connecting the upperportions of the said side walls to said bufling face, said meansinvolving a transversely extending web, said web having an openingtherein and upright flanges formed on the side edges of the saidopening.

2. In a draft rigging, the combination with the center sills of acasting adapted to form a stop for a movable element of the draftrigging and a tie member for the said sills, said casting comprising apair of end Walls, a pair of side Walls and a pair of transverselyextending webs or flanges, said webs serving to operatively connect,respectively, the upper and lower portions of said end walls to the saidside Walls, one of said webs being provided with a plurality of uprightflanges, said flanges being spaced from the other of the said webs.

3. In a draft rigging, the combination with a pair of center sills, of acombined stop and tie casting adapted to be connected to the adjacentfaces of the said sills and to abut a movable element of the draftrigging, said casting having a pair of upright transversely extendingend walls one of which is adapted to form a striking face, a pair ofupright side walls each connected 2 5 to the said end walls and meansfor further connecting one of the said end walls to the said side walls,said means comprising a horizontally disposed transversely extendingperforated web, provided with downwardly directing flanges.

4. In a draft rigging, the combination with a pair of center sills, of acombined back stop and tie casting of hollow box form, said castinghaving the side walls thereof connected to the adjacent faces of thesaid sills and its forward face adapted to abut a movable element of thesaid draft rigging, said casting having transversely disposed top andbottom members adapted to connect the side walls to the forward face,one of which is provided with an opening and means for reinforcing saidlast named member, said means comprising a flange depending from theside edges of the said opening and a plurality of webs connecting saidflange to the forward face of the said casting.

In testimony whereof I aflix my signature.

DONALD S. BARROWS.

